Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?

John Collins wrote:


When an approach is loaded, it is appended to the flight plan after the
destination airport. As stated earlier, the waypoints in the original flight
plan will sequence normally until the destination airport is reached, at
which time the 430 will navigate direct to the IAF waypoint and
automatically "activate" the approach sequence.

To cut to the chase, those of us familiar with using FMSes know to clear
the destination airport from the flight plan once the approach is
loaded. In a full-press FMS, this is known as a route-discontinuity.
And, clearing that discontinuity in a full-press FMS or a Garmin panel
mount will get it all to work as a flight plan with continuity.

John Collins wrote:
Sam, This is
necessary when the controller clears the pilot direct-to an IF (Intermediate
Fix) that is not an IAF.

When is an IF also an IAF and what do you do then?

"Sam Spade" wrote in message
...
John Collins wrote:


When an approach is loaded, it is appended to the flight plan after the
destination airport. As stated earlier, the waypoints in the original
flight plan will sequence normally until the destination airport is
reached, at which time the 430 will navigate direct to the IAF waypoint
and automatically "activate" the approach sequence.

To cut to the chase, those of us familiar with using FMSes know to clear
the destination airport from the flight plan once the approach is loaded.
In a full-press FMS, this is known as a route-discontinuity. And, clearing
that discontinuity in a full-press FMS or a Garmin panel mount will get it
all to work as a flight plan with continuity.

On a GNS430, activating the loaded approach is simpler. PROC, ENTER.

Sam,

To cut to the chase, those of us familiar with using FMSes know to clear
the destination airport from the flight plan once the approach is
loaded.


Ah, now I see. As STan says, activating is easier on the 430, IMHO.

--
Thomas Borchert (EDDH)

John,

Thanks, that was just my understanding, too.

--
Thomas Borchert (EDDH)

Stan Prevost wrote:

"Sam Spade" wrote in message
...

John Collins wrote:


When an approach is loaded, it is appended to the flight plan after
the destination airport. As stated earlier, the waypoints in the
original flight plan will sequence normally until the destination
airport is reached, at which time the 430 will navigate direct to the
IAF waypoint and automatically "activate" the approach sequence.


To cut to the chase, those of us familiar with using FMSes know to
clear the destination airport from the flight plan once the approach
is loaded. In a full-press FMS, this is known as a
route-discontinuity. And, clearing that discontinuity in a full-press
FMS or a Garmin panel mount will get it all to work as a flight plan
with continuity.


On a GNS430, activating the loaded approach is simpler. PROC, ENTER.


Like many things, there is more than one way to skin the cat with a Garmin.

Thomas Borchert wrote:

Sam,


To cut to the chase, those of us familiar with using FMSes know to clear
the destination airport from the flight plan once the approach is
loaded.



Ah, now I see. As STan says, activating is easier on the 430, IMHO.

Could be. Some shave with one hand, some with the left, others with
both. ;-)

John Collins wrote:

An Intermediate Fix may also be an Initial Approach Fix.

A typical example is a T style approach, where both the right base and the
left base ends are IAFs and the top center of the T is an IF, but not an
IAF. See http://204.108.4.16/d-tpp/0802/05726R5.PDF

There are numerous examples of the top center being both an IF and an IAF.
See http://204.108.4.16/d-tpp/0802/05683R28.PDF

When an IF is also an IAF, you can select the IF(IAF) in the select approach
dialog.

Actually, it is only (and always) when it has a hold-in-lieu course
reversal.

Next question: If a controller clears you directly to an IF/IAF do you
always disregard the hold-in-lieu course reversal and go straight-in?

Stan Prevost wrote:

"Sam Spade" wrote in message
...

John Collins wrote:


When an approach is loaded, it is appended to the flight plan after
the destination airport. As stated earlier, the waypoints in the
original flight plan will sequence normally until the destination
airport is reached, at which time the 430 will navigate direct to the
IAF waypoint and automatically "activate" the approach sequence.


To cut to the chase, those of us familiar with using FMSes know to
clear the destination airport from the flight plan once the approach
is loaded. In a full-press FMS, this is known as a
route-discontinuity. And, clearing that discontinuity in a full-press
FMS or a Garmin panel mount will get it all to work as a flight plan
with continuity.


On a GNS430, activating the loaded approach is simpler. PROC, ENTER.


I took another look at it and disagree. Once the IAP is selected
removing the airport can be done prior to a critical phase of flight,
then everything sequences without pilot intervention.

On 2/17/2008 8:57 AM, John Collins wrote the following:
Regardless,

The pilot should be prepared to fly direct to the non IAF type IF to join
the approach.

Yes, and I'm not sure why this is such a big deal here. It's the same thing you
do on any reroute. Just add the IF to the flight plan and activate that leg.
It doesn't matter whether there is an approach farther down the list or not.